可以上美国EPA的网站去查。美国EPA的网址 SDWA http://www.epa.gov/safewater/sdwa/sdwa.html List of Drinking Water Contaminants & MCLs http://www.epa.gov/ogwdw/mcl.html EPA Office of Water What'New Page http://www.epa.gov/ow/new.html Total Maximum Daily Loads http://www.epa.gov/OWOW/tmdl Water Quality Trading http://epa.gov/owow/watershed/trading.htm Water Quality Criteria and Standards http://www.epa.gov/waterscience/standards Biosolids http://www.epa.gov/biosolids.org or http://www.epa.gov/owm/mtb/biosoids/index.htm On Tap magazine http://www.nesc.wvu.edu/ndwc/articles/OT/SU03/SU03lndex.htm
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